You really need to shoot stuff that shows a bit more movement. #1 just looks a shot with some random motion blur, no need or point for the ND in there.
#2 is mostly washed out so we can't see the bulk of the water (which I presume is silky-smooth). Again, the blurry reeds only detract from this shot.
#3 is the best of the three, but still not a great shot. the angle is somewhat awkward (looking straight down onto the scene it looks like) and the line of whatever on the right side of the frame is a bit of an eyesore really. And again, even though the water is smooth, it doesn't really look like it was moving that much to begin with.
You need to find better subjects to shoot really. The beach is a good place to start, ditto the sky (clouds) or anything that moves really.